The electrification of vehicles is advancing rapidly, with DC-DC converters playing a central role in their electrical architecture. Semiconductor technologies such as gallium nitride (GaN) MOSFETs enable high-power, high-temperature operation, enhancing vehicle performance. However, these advancements necessitate improvements in microcontrollers managing these components, including faster computation, advanced pulse-width modulation (PWM) signal generation, and real-time synchronization. This thesis analyses the AURIX TC39 microcontroller in order to develop software for managing a DC-DC converter in a hybrid vehicle architecture. This architecture comprises one inverter connected to the electric motor and two DC-DC converters, one of which interfaces with a battery and the other with a fuel cell.